build: un-pinned some dependency versions

Some of our crates were pinning their dependency versions. This was
redundant, since we are using a versioned, worskspace-wide, Cargo.lock
which we update with every release. It also resulted in `cargo update`
not updating the depended-upon crates to their latest versions.

This commit switches all dependecy version specifications to the latest
version (i.e. the ">=<version>" syntax), and also updates Cargo.lock
(via `cargo update`).

Signed-off-by: Dan Horobeanu <[email protected]>

Author: dhrgit

Cargo.lock

@@ -7,7 +7,7 @@ authors = ["Amazon Firecracker team <[email protected]>"]
 serde = ">=1.0.27"
 serde_derive = ">=1.0.27"
 serde_json = ">=1.0.9"
-epoll = "=4.0.1"
+epoll = ">=4.0.1"
 libc = ">=0.2.39"
 
 logger = { path = "../logger" }

src/api_server/Cargo.toml

@@ -4,8 +4,8 @@ version = "0.1.0"
 authors = ["The Chromium OS Authors"]
 
 [dependencies]
-kvm-bindings = "0.1"
-kvm-ioctls = "0.3"
+kvm-bindings = ">=0.1"
+kvm-ioctls = ">=0.3"
 libc = ">=0.2.39"
 
 arch_gen = { path = "../arch_gen" }

src/arch/Cargo.toml

@@ -4,6 +4,6 @@ version = "0.1.0"
 authors = ["Amazon Firecracker team <[email protected]>"]
 
 [dependencies]
-kvm-bindings = "0.1"
-kvm-ioctls = "0.3"
-vmm-sys-util = "0.2.0"
+kvm-bindings = ">=0.1"
+kvm-ioctls = ">=0.3"
+vmm-sys-util = ">=0.2.0"

src/cpuid/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2018"
 
 [dependencies]
 byteorder = ">=1.2.1"
-epoll = "=4.0.1"
+epoll = ">=4.0.1"
 libc = ">=0.2.39"
 
 dumbo = { path = "../dumbo" }

src/devices/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.19.0"
 authors = ["Amazon Firecracker team <[email protected]>"]
 
 [dependencies]
-backtrace = {version = "=0.3.35", features = ["libunwind", "libbacktrace", "std"], default-features = false}
+backtrace = {version = ">=0.3.35", features = ["libunwind", "libbacktrace", "std"], default-features = false}
 clap = { version = ">=2.27.1", default-features = false}
 libc = ">=0.2.39"
 

src/firecracker/Cargo.toml

@@ -6,7 +6,7 @@ authors = ["Amazon Firecracker team <[email protected]>"]
 [dependencies]
 lazy_static = ">=1.2"
 libc = ">=0.2.39"
-log = { version = "0.4", features = ["std"] }
+log = { version = ">=0.4", features = ["std"] }
 serde = ">=1.0.27"
 serde_derive = ">=1.0.27"
 serde_json = ">=1.0.9"

src/logger/Cargo.toml

@@ -4,4 +4,4 @@ version = "0.1.0"
 authors = ["Amazon Firecracker team <[email protected]>"]
 
 [dependencies]
-epoll = "=4.0.1"
+epoll = ">=4.0.1"

src/micro_http/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Amazon Firecracker team <[email protected]>"]
 
 [dependencies]
 libc = ">=0.2.39"
-timerfd = "1.0"
+timerfd = ">=1.0"
 
 utils = { path = "../utils" }
 logger = { path = "../logger" }

src/rate_limiter/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Amazon Firecracker team <[email protected]>"]
 edition = "2018"
 
 [dependencies]
-vmm-sys-util = "0.2.0"
+vmm-sys-util = ">=0.2.0"
 libc = ">=0.2.39"
 serde = ">=1.0.27"
 net_gen = { path = "../net_gen" }

src/utils/Cargo.toml

@@ -4,10 +4,10 @@ version = "0.1.0"
 authors = ["Amazon Firecracker team <[email protected]>"]
 
 [dependencies]
-kvm-bindings = "0.1"
-kvm-ioctls = "0.3.0"
+kvm-bindings = ">=0.1"
+kvm-ioctls = ">=0.3.0"
 libc = ">=0.2.39"
-epoll = "=4.0.1"
+epoll = ">=4.0.1"
 serde = ">=1.0.27"
 serde_derive = ">=1.0.27"
 serde_json = ">=1.0.9"